CN103359827B - Fast starting method of MBR (Membrane bioreactor) autotrophic nitrogen removal technique, and method for synchronously removing carbonic nitrogen in domestic sewage by utilizing same - Google Patents
Fast starting method of MBR (Membrane bioreactor) autotrophic nitrogen removal technique, and method for synchronously removing carbonic nitrogen in domestic sewage by utilizing same Download PDFInfo
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 126
- 238000000034 method Methods 0.000 title claims abstract description 84
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 74
- 239000010865 sewage Substances 0.000 title claims abstract description 65
- 230000001651 autotrophic effect Effects 0.000 title claims abstract description 49
- 239000012528 membrane Substances 0.000 title claims description 11
- 238000005273 aeration Methods 0.000 claims abstract description 34
- 241000894006 Bacteria Species 0.000 claims abstract description 20
- 239000010802 sludge Substances 0.000 claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 55
- 230000008030 elimination Effects 0.000 claims description 30
- 238000003379 elimination reaction Methods 0.000 claims description 30
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 26
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 claims description 20
- 238000009825 accumulation Methods 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 10
- 241001453382 Nitrosomonadales Species 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 229910021529 ammonia Inorganic materials 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 5
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 4
- 238000011081 inoculation Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 6
- 229910052799 carbon Inorganic materials 0.000 abstract description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract description 3
- 230000001590 oxidative effect Effects 0.000 abstract 2
- 230000014759 maintenance of location Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 9
- 230000001360 synchronised effect Effects 0.000 description 6
- YCANCZRRZBHLEN-UHFFFAOYSA-N [N].O Chemical compound [N].O YCANCZRRZBHLEN-UHFFFAOYSA-N 0.000 description 4
- 239000002351 wastewater Substances 0.000 description 4
- 244000005700 microbiome Species 0.000 description 3
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000010840 domestic wastewater Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000010841 municipal wastewater Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012795 verification Methods 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
一种MBR反应器自养脱氮工艺的快速启动方法及利用其同步去除生活污水中碳氮的方法，它属于污水处理领域，本发明是要解决现有的自养脱氮工艺启动时间长的技术问题。启动方法：MBR反应器内接种普通活性污泥，在限氧条件下，逐渐缩短水力停留时间，富集好氧氨氧化菌；之后进一步降低DO及HRT，诱导富集厌氧氨氧化菌，完成启动；在室温条件下利用城市污水厂普通活性污泥经66天即可启动。同步去除生活污水中碳氮的方法为：加大曝气量，增大HRT，逐步引入生活污水，实现生活污水中碳氮的同步去除。本法的COD去除率达到80%以上，同时总氮去除负荷达到0.9kg/m3/d以上，该自养脱氮方法可用于在生活污水处理领域。
A quick start-up method of an MBR reactor autotrophic denitrification process and a method for synchronously removing carbon and nitrogen in domestic sewage by using it, which belongs to the field of sewage treatment. The present invention aims to solve the problem of long start-up time of the existing autotrophic denitrification process technical problem. Start-up method: MBR reactor is inoculated with ordinary activated sludge, and under oxygen-limited conditions, the hydraulic retention time is gradually shortened to enrich aerobic ammonium oxidizing bacteria; after that, DO and HRT are further reduced to induce and enrich anaerobic ammonium oxidizing bacteria. Start-up: It can be started after 66 days by using ordinary activated sludge from urban sewage plants at room temperature. The method of synchronously removing carbon and nitrogen in domestic sewage is: increasing the aeration rate, increasing HRT, and gradually introducing domestic sewage to realize the simultaneous removal of carbon and nitrogen in domestic sewage. The COD removal rate of this method reaches over 80%, and the total nitrogen removal load reaches over 0.9kg/m 3 /d at the same time. The autotrophic denitrification method can be used in the field of domestic sewage treatment.
Description
Technical field
The invention belongs to municipal sewage treatment and regeneration field, be specifically related to the method synchronously removing carbon nitrogen based on the sanitary sewage of normal temperature MBR autotrophic denitrification technique.
Background technology
Autotrophic denitrification technique is a kind of Process of Biological Nitrogen Removal, can complete denitrogenation in single reaction vessel, and without the need to additional carbon, saving aeration, is one of current most economical effective Approach of Removal of Nitrogen.But, functional microorganism aerobic ammonia oxidation bacterium (AOB) in autotrophic denitrification technique and anaerobic ammonia oxidizing bacteria (anammox) all belong to autotrophic bacteria, poor growth is difficult to enrichment, thus cause the reactor start-up time long, total nitrogen elimination capacity is low, such as Beijing University of Technology's Master's thesis " high temperature height ammonia nitrogen CANON technical study and application pre-test ", reactor start-up was for up to 114 days.Microorganism can be trapped in reactor by MBR reactor, solves the poky difficult problem of autotrophic bacteria to a certain extent.
Autotrophic denitrification technique is generally applied to the process of high temperature high ammonia-nitrogen wastewater, for normal temperature sanitary sewage at present also without examples of many successful.But " China Environmental State Bulletin in 2012 " display that Chinese Ministry of Environmental Protection announces, the COD in sanitary sewage and ammonia nitrogen occupy the over half of whole wastewater discharge, and therefore, in sanitary sewage, the removal of carbon nitrogen becomes problem demanding prompt solution.By MBR autotrophic denitrification process application in the process of sanitary sewage, COD and ammonia nitrogen can be removed under the condition consuming the lower energy and capital cost simultaneously, effectively reduce municipal wastewater treatment plant processing load, improve effluent quality, there is no the report of this aspect at present.
Summary of the invention
The present invention is the technical problem that will solve existing autotrophic denitrification technique length start time, and provide a kind of quick start method of MBR reactor autotrophic denitrification technique, and then the MBR reactor providing utilization to start autotrophic denitrification synchronously removes the method for carbon nitrogen in sanitary sewage.
The quick start method of a kind of MBR reactor autotrophic denitrification technique of the present invention carries out according to the following steps:
One, artificial distribution passed in MBR reactor, then ordinary activated sludge be inoculated in MBR reactor, in inoculation post-reactor, ordinary activated sludge concentration is 3.5 ~ 4.5g/L; Wherein in artificial distribution, ammonia nitrogen concentration is 80 ~ 95mg/L, pH is 7.5 ~ 8.0, and the temperature of artificial distribution is 23 ~ 27 DEG C;
Two, in MBR reactor, dissolved oxygen concentration (DO) is run under the condition of 0.2 ~ 0.4mg/L, first controlling hydraulic detention time (HRT) is that 8 ~ 8.5h runs 5 ~ 6 days, then hydraulic detention time (HRT) is down to 5 ~ 5.5h and runs 10 ~ 15 days, again hydraulic detention time (HRT) is down to 3 ~ 3.5h to run, detect the sub-nitrogen accumulation rate of water outlet simultaneously, start to count when the sub-nitrogen accumulation rate of water outlet reaches 99%, rerun 15 days, complete the enrichment of aerobic ammonia-oxidizing bacteria (AOB);
Three, continue under the condition that dissolved oxygen concentration (DO) is 0.1mg/L≤DO < 0.2mg/L in MBR reactor to run, hydraulic detention time is 1.8 ~ 2.2h, detect the total nitrogen elimination capacity of membrane bioreactor, when total nitrogen elimination capacity reaches 0.1kg/m simultaneously
3during/d, complete the enrichment of anaerobic ammonia oxidizing bacteria (anammox), namely the autotrophic denitrification technique of MBR reactor starts successfully.
Main containing ammonia oxidation bacteria, nitrifier, denitrifying bacteria and heterotrophic bacterium in ordinary activated sludge described in step one;
Sub-nitrogen accumulation rate described in step 2 is defined as: the sub-nitrogen+nitre nitrogen of sub-nitrogen accumulation rate (%)=sub-nitrogen × 100/();
Total nitrogen elimination capacity described in step 3 is defined as: total nitrogen elimination capacity=(water inlet total nitrogen-water outlet total nitrogen) × flooding velocity × 24/(reactor volume × 1000); Wherein the intake unit of total nitrogen is mg/L; The unit of water outlet total nitrogen is mg/L; The unit of flooding velocity is L/h; The unit of reactor volume is L; 24 meanings represented are one day 24 hours;
Utilize method of the present invention, with municipal wastewater treatment plant common sludge for kind of a mud, ordinary activated sludge wide material sources, be easy to obtain, without the need to heating, at ambient temperature, the autotrophic denitrification technique of MBR reactor is namely capable of fast starting through 66 days, the fast and save energy of speed.
The method utilizing the above-mentioned MBR reactor having started autotrophic denitrification synchronously to remove carbon nitrogen in sanitary sewage is carried out according to the following steps:
One, in the artificial distribution of MBR reactor starting autotrophic denitrification, sanitary sewage is added as water inlet, wherein sanitary sewage accounts for the volume percent into water is 20% ~ 30%, temperature be 24 ~ 28 DEG C, pH is 7.2 ~ 7.6, DO is 0.3 ~ 0.5mg/L, hydraulic detention time runs 8 ~ 10 days under being the condition of 2.5 ~ 3.0h;
Two, by sanitary sewage, the volume percent accounted for into water rises to 45% ~ 55%, continue temperature be 24 ~ 28 DEG C, pH is 7.2 ~ 7.6, DO is 0.3 ~ 0.5mg/L, hydraulic detention time runs 8 ~ 10 days under being the condition of 2.5 ~ 3.0h;
Three, using the solid flooding of sanitary sewage as MBR reactor, temperature be 24 ~ 28 DEG C, pH is 7.2 ~ 7.6, DO is 0.3 ~ 0.5mg/L, hydraulic detention time runs under being the condition of 2.5 ~ 3.0h, completes the process of sanitary sewage.
In wherein artificial distribution wherein described in step one, ammonia nitrogen concentration is 80 ~ 95mg/L, pH is 7.5 ~ 8.0, and the temperature of artificial distribution is 23 ~ 27 DEG C, close to the sanitary sewage ammonia nitrogen concentration intending process.
The present invention is by the process of autotrophic denitrification process application in actual domestic wastewater, solve the difficult problem that autotrophic denitrification technique is difficult to process normal-temperature low-ammonia-nitrogen waste water, present method by regulating DO and HRT to start autotrophic denitrification technique, without the need to changing influent quality, is suitable for the application of Practical Project at normal temperatures.Utilize the sanitary sewage of present method process, its COD clearance reaches more than 80%, and total nitrogen elimination capacity reaches 0.9kg/m simultaneously
3/ more than d, successfully realizes the synchronous removal of carbon nitrogen in sanitary sewage.In addition, MBR reactor is applied in the research of Full Autotrophic Ammonium Removal Process by the present invention, solves autotrophy mud poor growth, the difficult problem that processing load is low, and the final total nitrogen elimination capacity of simultaneous reactions device reaches 0.94kg/m
3/ d, this is higher at last in generic reaction device, facilitates the application of autotrophic denitrification technique in sanitary sewage.
Accompanying drawing explanation
Fig. 1 is MBR reactor schematic diagram in test 1, and in figure, 1 is water tank, and 2 is water pump, 3 is aeration tank, and 4 is vacuum pump, and 5 is air pump, 6 is gas meter, 7 is agitator controller, and 8 is online dissolved oxygen meter, and 9 is online pH Monitoring equipment, 3-1 is membrane module, 3-2 is water bath sleeve, and 3-3 is aeration ring, and 3-4 is mud discharging mouth;
Fig. 2 is the operating performance figure unloading phase that MBR reactor autotrophic denitrification technique being quick in test 1, in figure, curve a is influent ammonia nitrogen variation relation curve in time, curve b is sub-nitrogen accumulation rate variation relation curve in time, curve c is total nitrogen elimination capacity variation relation curve in time, and curve d is hydraulic detention time (HRT) variation relation curve in time;
Fig. 3 is the operating performance figure that in test 1, MBR reactor synchronously removes carbon nitrogen in sanitary sewage, and curve e is influent ammonia nitrogen variation relation curve in time; Curve f is total nitrogen elimination capacity variation relation curve in time; Curve g is COD clearance variation relation curve in time.
Embodiment
Embodiment one: the quick start method of a kind of MBR reactor autotrophic denitrification technique of present embodiment carries out according to the following steps:
One, artificial distribution passed in MBR reactor, then ordinary activated sludge be inoculated in MBR reactor, in inoculation post-reactor, ordinary activated sludge concentration is 3.5 ~ 4.5g/L; Wherein in artificial distribution, ammonia nitrogen concentration is 80 ~ 95mg/L, pH is 7.5 ~ 8.0, and the temperature of artificial distribution is 23 ~ 27 DEG C;
Two, in MBR reactor, dissolved oxygen concentration (DO) is run under the condition of 0.2 ~ 0.4mg/L, first controlling hydraulic detention time (HRT) is that 8 ~ 8.5h runs 5 ~ 6 days, then hydraulic detention time (HRT) is down to 5 ~ 5.5h and runs 10 ~ 15 days, again hydraulic detention time (HRT) is down to 3 ~ 3.5h to run, detect the sub-nitrogen accumulation rate of water outlet simultaneously, start to count when the sub-nitrogen accumulation rate of water outlet reaches 99%, rerun 15 days, complete the enrichment of aerobic ammonia-oxidizing bacteria (AOB);
Three, in MBR reactor, dissolved oxygen concentration is continue under the condition of 0.1mg/L≤DO < 0.2mg/L to run, and hydraulic detention time is 1.8 ~ 2.2h, simultaneously the total nitrogen elimination capacity of detection reaction device, when total nitrogen elimination capacity reaches 0.1kg/m
3during/d, complete the enrichment of anaerobic ammonia oxidizing bacteria (anammox), namely the autotrophic denitrification technique of MBR reactor starts successfully.
Sub-nitrogen accumulation rate described in step 2 is defined as: the sub-nitrogen+nitre nitrogen of sub-nitrogen accumulation rate (%)=sub-nitrogen × 100/();
Total nitrogen elimination capacity described in step 3 is defined as: total nitrogen elimination capacity=(water inlet total nitrogen-water outlet total nitrogen) × flooding velocity × 24/(reactor volume × 1000); Wherein the intake unit of total nitrogen is mg/L; The unit of water outlet total nitrogen is mg/L; The unit of flooding velocity is L/h; The unit of reactor volume is L; 24 meanings represented are one day 24 hours;
Utilize method of the present invention, with common sludge for kind of a mud, ordinary activated sludge wide material sources, be easy to obtain, without the need to heating, at ambient temperature, the autotrophic denitrification technique of MBR reactor is namely capable of fast starting through 66 days, the fast and save energy of speed.
Embodiment two: present embodiment and embodiment one contain ammonia oxidation bacteria, nitrifier, denitrifying bacteria and heterotrophic bacterium unlike in the ordinary activated sludge described in step one; Other is identical with embodiment one.
Embodiment three: (see Fig. 1) present embodiment and embodiment one or two are made up of water tank 1, water pump 2, aeration tank 3, vacuum pump 4, air pump 5, gas meter 6, agitator 7, online dissolved oxygen meter 8, online pH Monitoring equipment 9 unlike the MBR reactor described in step one, the outer wall of aeration tank 3 arranges water bath sleeve 3-2, membrane module 3-1 is arranged in aeration tank 3, the bottom of aeration tank 3 is provided with aeration ring 3-3, and the lower sidewall of aeration tank 3 is provided with mud discharging mouth 3-4; Water tank 1 is communicated with aeration tank 3 by water pump 2, vacuum pump 4 is communicated with membrane module 3-1, air pump 5 is connected with aeration ring 3-3, pipeline between air pump 5 and aeration ring 3-3 arranges gas meter 6, and the detecting head of the stirring rake of agitator 7, the detecting head of online dissolved oxygen meter 8, online pH Monitoring equipment 9 is all arranged in aeration tank 3.Other is identical with embodiment one or two.
Embodiment four: the method that the MBR reactor utilizing embodiment one to start autotrophic denitrification synchronously removes carbon nitrogen in sanitary sewage is carried out according to the following steps:
One, in the artificial distribution of MBR reactor starting autotrophic denitrification, sanitary sewage is added as water inlet, wherein sanitary sewage accounts for the volume percent into water is 20% ~ 30%, temperature be 24 ~ 28 DEG C, pH is 7.2 ~ 7.6, DO is 0.3 ~ 0.5mg/L, hydraulic detention time runs 8 ~ 10 days under being the condition of 2.5 ~ 3.0h; Wherein in artificial distribution, ammonia nitrogen concentration is 80 ~ 95mg/L, pH is 7.5 ~ 8.0, and the temperature of artificial distribution is 23 ~ 27 DEG C;
Two, by sanitary sewage, the volume percent accounted for into water rises to 50% ~ 60%, continue temperature be 24 ~ 28 DEG C, pH is 7.2 ~ 7.6, DO is 0.3 ~ 0.5mg/L, hydraulic detention time runs 8 ~ 10 days under being the condition of 2.5 ~ 3.0h;
Three, using the solid flooding of sanitary sewage as MBR reactor, temperature be 24 ~ 28 DEG C, pH is 7.2 ~ 7.6, DO is 0.3 ~ 0.5mg/L, hydraulic detention time runs under being the condition of 2.5 ~ 3.0h, completes the process of sanitary sewage.
Present embodiment is by the process of autotrophic denitrification process application in actual domestic wastewater, solve the difficult problem that autotrophic denitrification technique is difficult to process normal-temperature low-ammonia-nitrogen waste water, present method is at normal temperatures by regulating DO and HRT to start autotrophic denitrification technique, without the need to changing influent quality, be suitable for the application of Practical Project.Utilize the sanitary sewage of present method process, its COD clearance reaches more than 80%, and total nitrogen elimination capacity reaches 0.9kg/m simultaneously
3/ more than d, successfully realizes the synchronous removal of carbon nitrogen in sanitary sewage.
Embodiment five: present embodiment and embodiment four are 90mg/L unlike the ammonia nitrogen concentration of the artificial distribution described in step one.Other is identical with embodiment four.
The ammonia nitrogen concentration of water distribution in present embodiment is in the scope of 80 ~ 95mg/L, and the ammonia nitrogen concentration of the water distribution in this scope is close to the sanitary sewage ammonia nitrogen concentration intending process.The object of such setting is to make microorganism adapt to identical nitrogen matrix in advance, can ensure that microbic activity is not suppressed because of the change of substrate concn going up to greatest extent after access sanitary sewage.
Embodiment six: present embodiment and embodiment four are 93mg/L unlike the ammonia nitrogen concentration of the artificial distribution described in step one.Other is identical with embodiment four.
Embodiment seven: the volume percent that one of present embodiment and embodiment four to six account for into water unlike sanitary sewage in step one is 25%.Other is identical with one of embodiment four to six.
Embodiment eight: the volume percent accounted for into water rises to 55% by sanitary sewage unlike in step 2 for one of present embodiment and embodiment four to seven.Other is identical with one of embodiment four to seven.
Embodiment nine: one of present embodiment and embodiment four to eight unlike the operational conditions in step 3 are: temperature is 25 ~ 27 DEG C, pH is 7.3 ~ 7.5, DO is 0.35 ~ 0.45mg/L, hydraulic detention time is 2.7 ~ 2.9h.Other is identical with one of embodiment four to eight.
With following verification experimental verification beneficial effect of the present invention:
Test 1: the MBR reactor that this test adopts as shown in Figure 1, this MBR reactor is made up of water tank 1, water pump 2, aeration tank 3, vacuum pump 4, air pump 5, gas meter 6, agitator 7, online dissolved oxygen meter 8, online pH Monitoring equipment 9, the outer wall of aeration tank 3 arranges water bath sleeve 3-2, membrane module 3-1 is arranged in aeration tank 3, the bottom of aeration tank 3 is provided with aeration ring 3-3, and the lower sidewall of aeration tank 3 is provided with mud discharging mouth 3-4; Water tank 1 is communicated with aeration tank 3 by water pump 2, vacuum pump 4 is communicated with membrane module 3-1, air pump 5 is connected with aeration ring 3-3, pipeline between air pump 5 and aeration ring 3-3 arranges gas meter 6, and the detecting head of the stirring rake of agitator 7, the detecting head of online dissolved oxygen meter 8, online pH Monitoring equipment 9 is all arranged in aeration tank 3.
The reactor effective volume of this test is 5L.
The quick start method of the autotrophic denitrification technique of above-mentioned MBR reactor is utilized to carry out according to the following steps:
One, artificial distribution passed in MBR reactor, then ordinary activated sludge be inoculated in MBR reactor, in inoculation post-reactor, ordinary activated sludge concentration is 3.5 ~ 4.5g/L; Wherein artificial distribution is by (NH
4)
2sO
4, NaHCO
3, CaCl
2, MgSO
4h
2o and KH
2pO
4configuration forms, and not containing organic carbon source, in artificial distribution, ammonia nitrogen concentration is 80 ~ 95mg/L, pH is 7.5 ~ 8.0, and variation relation curve is as shown in the curve a of Fig. 2 in time for its real-time condition such as influent ammonia nitrogen in accompanying drawing 2, and the temperature of artificial distribution is 24 DEG C;
Two, run under the condition that first dissolved oxygen concentration (DO) is 0.4mg/L in MBR reactor, after control hydraulic detention time (HRT) runs 5 days by 8.5h, hydraulic detention time (HRT) is down to 5h and runs 14 days, again hydraulic detention time is down to 3.5h to run, detect the sub-nitrogen accumulation rate of water outlet simultaneously, counting when the sub-nitrogen accumulation rate of water outlet reaches 99%, rerun 15 days, complete the enrichment of aerobic ammonia-oxidizing bacteria (AOB); This sub-nitrogen accumulation rate in stage in time variation relation as shown in Fig. 2 curve b;
Three, in MBR reactor, dissolved oxygen concentration is continue under the condition of 0.2mg/L to run, and hydraulic detention time is 2h, detects the total nitrogen elimination capacity of membrane bioreactor simultaneously, reaches 0.1kg/m at the 66th day total nitrogen elimination capacity
3/ d, thinks that anammox obtains enrichment, and the autotrophic denitrification technique of MBR reactor starts successfully.
The bacterium mainly contained in ordinary activated sludge described in step one is ammonia oxidation bacteria, nitrifier, denitrifying bacteria and heterotrophic bacterium, takes from sewage work of Gaobeidian City of Beijing;
Sub-nitrogen accumulation rate described in step 2 is defined as: the sub-nitrogen+nitre nitrogen of sub-nitrogen accumulation rate (%)=sub-nitrogen × 100/();
Total nitrogen elimination capacity described in step 3 is defined as: total nitrogen elimination capacity=(water inlet total nitrogen-water outlet total nitrogen) × flooding velocity × 24/(reactor volume × 1000); Wherein the intake unit of total nitrogen is mg/L; The unit of water outlet total nitrogen is mg/L; The unit of flooding velocity is L/h; The unit of reactor volume is L; 24 meanings represented are one day 24 hours;
In this test, after 66th day, total nitrogen elimination capacity grows steadily, and can keep steady running more than 30 days, and in visible reactor, active sludge changes reddish-brown into by brownish black gradually via yellow simultaneously, in operation after 100 days, total nitrogen elimination capacity reaches 0.95kg/m
3/ d, reaches 1.0kg/m at this stage final total nitrogen elimination capacity
3/ d, variation relation curve c is as shown in Figure 2 in time for this stage total nitrogen elimination capacity.The MBR self-supported denitrification reactor started in the method for the membrane bioreactor of this operation after 100 days (MBR) as carbon nitrogen in following synchronous removal sanitary sewage is used.
The above-mentioned method having started carbon nitrogen in the synchronous removal sanitary sewage of the MBR reactor of autotrophic denitrification is utilized to carry out according to the following steps:
One, in the artificial distribution of MBR reactor starting autotrophic denitrification, sanitary sewage is added as water inlet, wherein sanitary sewage accounts for the volume percent into water is 25%, temperature be 26 DEG C, pH is 7.6, DO is 0.3mg/L, hydraulic detention time runs 10 days under being the condition of 2.5h; Wherein artificial distribution is by (NH
4)
2sO
4, NaHCO
3, CaCl
2, MgSO
4h
2o and KH
2pO
4configuration forms, and not containing organic carbon source, in artificial distribution, ammonia nitrogen concentration is 80 ~ 95mg/L, pH is 7.5 ~ 8.0, and the temperature of artificial distribution is 24 DEG C;
Two, by sanitary sewage, the volume percent accounted for into water rises to 50%, continue temperature be 26 DEG C, pH is 7.4, DO is 0.4mg/L, hydraulic detention time runs 10 days under being the condition of 2.8h;
Three, using the solid flooding of sanitary sewage as MBR reactor, temperature be 26 DEG C, pH is 7.2, DO is 0.5mg/L, hydraulic detention time runs under being the condition of 3.0h, completes the process of sanitary sewage.
Influent ammonia nitrogen in the treating processes of this test sanitary sewage, total nitrogen elimination capacity and COD clearance in time the MBR reactor of variation relation curve as Fig. 3 are synchronously removed shown in the operating performance figure of carbon nitrogen in sanitary sewage, and wherein curve e is influent ammonia nitrogen variation relation curve in time; Curve f is total nitrogen elimination capacity variation relation curve in time; Curve g is COD clearance variation relation curve in time.
Wherein COD clearance (%)=(influent COD-water outlet COD) × 100/ influent COD;
Total nitrogen elimination capacity=(water inlet total nitrogen-water outlet total nitrogen) × flooding velocity × 24/(reactor volume × 1000).
As can be seen from Figure 3, in operation after one week, total nitrogen elimination capacity gos up gradually, and COD clearance increases gradually, and when in reactor water inlet, sanitary sewage ratio reaches 100%, run after 25 days, COD clearance and total nitrogen elimination capacity reach 80% and 0.9kg/m respectively
3/ more than d, think the synchronous removal successfully realizing carbon nitrogen in sanitary sewage, in simultaneous reactions device, mud is by red-brown blackening gradually, indicate the enrichment of heterotrophic bacterium, heterotrophic bacterium, AOB and anammox synergy, complete the removal of ammonia nitrogen and COD, MBR autotrophic denitrification technique is successfully applied to the synchronous removal of carbon nitrogen in sanitary sewage.In this stage, total nitrogen elimination capacity finally reaches 0.96kg/m
3/ more than d, COD clearance reaches more than 80%.
Claims (8)
1. a quick start method for MBR reactor autotrophic denitrification technique, is characterized in that the method is carried out according to the following steps:
One, artificial distribution passed in MBR reactor, then ordinary activated sludge be inoculated in MBR reactor, in inoculation post-reactor, ordinary activated sludge concentration is 3.5 ~ 4.5g/L; Wherein in artificial distribution, ammonia nitrogen concentration is 80 ~ 95mg/L, pH is 7.5 ~ 8.0, and the temperature of artificial distribution is 23 ~ 27 DEG C; Containing ammonia oxidation bacteria, nitrifier, denitrifying bacteria and heterotrophic bacterium in wherein said ordinary activated sludge;
Two, in MBR reactor, dissolved oxygen concentration is run under the condition of 0.2 ~ 0.4mg/L, first controlling hydraulic detention time is that 8 ~ 8.5h runs 5 ~ 6 days, then hydraulic detention time is down to 5 ~ 5.5h and runs 10 ~ 15 days, again hydraulic detention time is down to 3 ~ 3.5h to run, detect the sub-nitrogen accumulation rate of water outlet simultaneously, start to count when the sub-nitrogen accumulation rate of water outlet reaches 99%, rerun 15 days, complete the enrichment of aerobic ammonia-oxidizing bacteria;
Three, in MBR reactor, dissolved oxygen concentration is continue under the condition of 0.1mg/L≤DO < 0.2mg/L to run, and hydraulic detention time is 1.8 ~ 2.2h, simultaneously the total nitrogen elimination capacity of detection reaction device, when total nitrogen elimination capacity reaches 0.1kg/m
3during/d, complete the enrichment of anaerobic ammonia oxidizing bacteria, namely the autotrophic denitrification technique of MBR reactor starts successfully.
2. the quick start method of a kind of MBR reactor autotrophic denitrification technique according to claim 1, it is characterized in that the MBR reactor described in step one is by water tank (1), water pump (2), aeration tank (3), vacuum pump (4), air pump (5), gas meter (6), agitator (7), online dissolved oxygen meter (8), online pH Monitoring equipment (9) composition, the outer wall of aeration tank (3) arranges water bath sleeve (3-2), membrane module (3-1) is arranged in aeration tank (3), the bottom of aeration tank (3) is provided with aeration ring (3-3), the lower sidewall of aeration tank (3) is provided with mud discharging mouth (3-4), water tank (1) is communicated with aeration tank (3) by water pump (2), vacuum pump (4) is communicated with membrane module (3-1), air pump (5) is connected with aeration ring (3-3), pipeline between air pump (5) and aeration ring (3-3) is arranged gas meter (6), the detecting head of the stirring rake of agitator (7), the detecting head of online dissolved oxygen meter (8), online pH Monitoring equipment (9) is all arranged in aeration tank (3).
3. the MBR reactor utilizing claim 1 to start autotrophic denitrification synchronously removes the method for carbon nitrogen in sanitary sewage, it is characterized in that the method is carried out according to the following steps:
One, started in claim 1 in the artificial distribution of the MBR reactor of autotrophic denitrification and added sanitary sewage as water inlet, wherein sanitary sewage accounts for the volume percent into water is 20% ~ 30%, temperature be 24 ~ 28 DEG C, pH is 7.2 ~ 7.6, DO is 0.3 ~ 0.5mg/L, hydraulic detention time runs 8 ~ 10 days under being the condition of 2.5 ~ 3.0h; Wherein in artificial distribution, ammonia nitrogen concentration is 80 ~ 95mg/L, pH is 7.5 ~ 8.0, and the temperature of artificial distribution is 23 ~ 27 DEG C;
Two, by sanitary sewage, the volume percent accounted for into water rises to 45% ~ 55%, continue temperature be 24 ~ 28 DEG C, pH is 7.2 ~ 7.6, DO is 0.3 ~ 0.5mg/L, hydraulic detention time runs 8 ~ 10 days under being the condition of 2.5 ~ 3.0h;
Three, using the solid flooding of sanitary sewage as MBR reactor, temperature be 24 ~ 28 DEG C, pH is 7.2 ~ 7.6, DO is 0.3 ~ 0.5mg/L, hydraulic detention time runs under being the condition of 2.5 ~ 3.0h, completes the process of sanitary sewage.
4. utilize the MBR reactor starting autotrophic denitrification synchronously to remove the method for carbon nitrogen in sanitary sewage according to claim 3, it is characterized in that the ammonia nitrogen concentration of the water distribution described in step one is 90mg/L.
5. utilize the MBR reactor starting autotrophic denitrification synchronously to remove the method for carbon nitrogen in sanitary sewage according to claim 3, it is characterized in that the ammonia nitrogen concentration of the water distribution described in step one is 93mg/L.
6. utilize the MBR reactor having started autotrophic denitrification synchronously to remove the method for carbon nitrogen in sanitary sewage according to claim 3,4 or 5, it is characterized in that the volume percent that in step one, sanitary sewage accounts for into water is 25%.
7. utilize the MBR reactor having started autotrophic denitrification synchronously to remove the method for carbon nitrogen in sanitary sewage according to claim 3,4 or 5, it is characterized in that in step 2, the volume percent accounted for into water rises to 50% by sanitary sewage.
8. utilize the MBR reactor having started autotrophic denitrification synchronously to remove the method for carbon nitrogen in sanitary sewage according to claim 3,4 or 5, it is characterized in that the operational conditions in step 3 is: temperature is 25 ~ 27 DEG C, pH is 7.3 ~ 7.5, DO is 0.35 ~ 0.45mg/L, hydraulic detention time is 2.7 ~ 2.9h.
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| CN104386812A (en) * | 2014-11-13 | 2015-03-04 | 清华大学 | Composite anaerobic ammonia oxidation reaction process and device based on granule sludge and biological films |
| CN105236568B (en) * | 2015-08-07 | 2017-06-16 | 北京大学 | A kind of method that Anammox is run using microbial immobilized membrane bioreactor |
| CN105384242B (en) * | 2015-12-28 | 2017-10-13 | 郑州轻工业学院 | A kind of utilization membrane bioreactor synchronously removes the startup method of the technique of carbon, nitrogen and suspension in low-carbon-source waste water |
| CN105923765B (en) * | 2016-07-04 | 2019-07-19 | 合肥工业大学 | A kind of fast start-up method of anammox reactor |
| CN107473382B (en) * | 2017-10-16 | 2020-06-30 | 环境保护部华南环境科学研究所 | Biological treatment method for realizing simultaneous removal of carbon and nitrogen in sewage by controlling dissolved oxygen |
| CN109179649B (en) * | 2018-09-18 | 2021-04-16 | 郑州轻工业学院 | A method for rapidly inducing and enriching anammox bacteria from nitrosated sludge |
| CN110577276A (en) * | 2019-10-21 | 2019-12-17 | 郑州轻工业学院 | A device and method for determining the influence of pollution factors on the biological activity of aerobic processes |
| CN113060834B (en) * | 2021-03-17 | 2022-04-01 | 北京建筑大学 | Biological denitrification method and system starting method for domestic sewage |
| CN112978924B (en) * | 2021-04-21 | 2024-09-27 | 北京建筑大学 | Method for inoculating sludge, device and starting water treatment system by main stream single-stage autotrophic nitrogen removal system |
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